期刊
BIOFABRICATION
卷 12, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1758-5090/ab6d37
关键词
3D printing; microneedle; transdermal; anti-wrinkle; small peptide; material extrusion
资金
- Singapore National additive manufacturing innovation cluster (NAMIC) project [2016011]
- Singapore Ministry of Education (MOE) Academic Research Fund (AcRF) Tier 1 grant [R148-000-224-112]
Acetyl-hexapeptide-3 (AHP-3) is a small peptide with good anti-wrinkle efficacy and safety profile. However, due to its hydrophilicity and high molecular weight, its skin permeation is generally poor. An innovative microneedle (MN) patch such as the curved, flexible or personalised MN patch is a viable avenue to deliver AHP-3. However, the well-researched geometrical relationship of MN on a flat MN patch cannot be assumed for these novel MN patches due to a complex mix of axial and shear forces. In this study, 3D printing was used for the fabrication of various MN patches with different MN geometries and curvatures. Both mechanical strength and skin penetration efficiency were used to determine the optimal MN geometry. The optimal MN geometry was then applied to the fabrication of a personalized MN patch (PMNP) for anti-wrinkle therapy, via 3D printing. In all, the general principles of MN geometrical effects on mechanical strength and skin penetration efficiency for a curved and a flat MN patch were similar. A MN height of 800 mu m, tip diameter of 100 mu m, interspacing of 800 mu m and base diameter of 400 mu m was observed to be the optimal MN geometry across all curvatures. In vitro skin permeation study demonstrated enhanced transdermal delivery of AHP-3 using the fabricated PMNP. Therefore, PMNP with optimized MN geometry can potentially be a novel approach to augment transdermal delivery of AHP-3 for effective wrinkle management.
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